認證事件（Authentication Events）

對于每個成功或失敗的身份驗證，将分别觸發一個 AuthenticationSuccessEvent 或 AbstractAuthenticationFailureEvent 。

要偵聽這些事件，你必須首先釋出一個 AuthenticationEventPublisher，Spring Security 的 DefaultAuthenticationEventPublisher 可能會做得很好:

@Bean
public AuthenticationEventPublisher authenticationEventPublisher
        (ApplicationEventPublisher applicationEventPublisher) {
    return new DefaultAuthenticationEventPublisher(applicationEventPublisher);
}
           

然後，你可以使用 Spring 的@EventListener 支援:

@Component
public class AuthenticationEvents {
	@EventListener
    public void onSuccess(AuthenticationSuccessEvent success) {
		// ...
    }

    @EventListener
    public void onFailure(AbstractAuthenticationFailureEvent failures) {
		// ...
    }
}
           

雖然類似于 AuthenticationSuccessHandler 和 AuthenticationFailureHandler，但它們很好，因為它們可以獨立于Servlet API使用。

添加異常映射（Adding Exception Mappings）

預設情況下，DefaultAuthenticationEventPublisher 将為以下事件釋出一個 AbstractAuthenticationFailureEvent :

Exception	Event
BadCredentialsException	AuthenticationFailureBadCredentialsEvent
UsernameNotFoundException	AuthenticationFailureBadCredentialsEvent
AccountExpiredException	AuthenticationFailureExpiredEvent
ProviderNotFoundException	AuthenticationFailureProviderNotFoundEvent
DisabledException	AuthenticationFailureDisabledEvent
LockedException	AuthenticationFailureLockedEvent
AuthenticationServiceException	AuthenticationFailureServiceExceptionEvent
CredentialsExpiredException	AuthenticationFailureCredentialsExpiredEvent
InvalidBearerTokenException	AuthenticationFailureBadCredentialsEvent
釋出者執行精确的異常比對，這意味着這些異常的子類不會也生成事件。
為此，您可能需要通過 setAdditionalExceptionMappings 方法向釋出者提供額外的映射:

@Bean
public AuthenticationEventPublisher authenticationEventPublisher (ApplicationEventPublisher applicationEventPublisher) {
    Map<Class<? extends AuthenticationException>,
        Class<? extends AbstractAuthenticationFailureEvent>> mapping =
            Collections.singletonMap(FooException.class, FooEvent.class);
    AuthenticationEventPublisher authenticationEventPublisher =
        new DefaultAuthenticationEventPublisher(applicationEventPublisher);
    authenticationEventPublisher.setAdditionalExceptionMappings(mapping);
    return authenticationEventPublisher;
}
           

預設事件（Default Event）

您可以提供一個通用事件，以便在發生任何身份驗證異常的情況下觸發：

@Bean
public AuthenticationEventPublisher authenticationEventPublisher
        (ApplicationEventPublisher applicationEventPublisher) {
    AuthenticationEventPublisher authenticationEventPublisher =
        new DefaultAuthenticationEventPublisher(applicationEventPublisher);
    authenticationEventPublisher.setDefaultAuthenticationFailureEvent
        (GenericAuthenticationFailureEvent.class);
    return authenticationEventPublisher;
}